Concrete building block



March 18 1924. 1,437,526"

' W. M. BASHLIN CONCRETE BUILDING BLOCK Original Filed Jan/13. 1922 Patented Mar. 18, 1924.

WILLIAM M. BASI-ILIN, OF DE LAND, FLORIDA.

CONCRETE BUILDING BLOCK.

Application filed January 13, 1922, Serial No. 528,953. Renewed September 28, 1928.

To all 207:0721, may concern.

Be it known that I. lVILLLiM M. BASHLIN, a citizen of the United States, residing at De Land. in the county of Volusia and State of Florida, have invented new and useful Improvements in Concrete Building Blocks, of which the following is a-specification.

This invention relates to concrete building blocks and has for one of its objects the provision of a molded unit which is adapted to be independently applied to the work under construction or used in combination with like units to. form other unitary constructional elements.

Another object of the invention is to construct a unit of the type described made of concrete or cement, in which a surface or the surfaces thereof are provided with means by which said unit is adapted to be anchored to wood or to interlock with plastic material which may be applied thereto. i o

Still another object of the invention is the fabrication of oists,girders sills and other stress bearing members from various combinations and arrangements ofthe molded unit.

lVith the above and other objects in view, my invention consists in the improved concrete building blocks illustrated in the accompanying drawings, described in the fol lowing specification and particularly claimed, and in such variations and modifications thereof as will be obvious to those skilled in the art to which my invention relates.

In the drawings accompanying and forming a part of this specification, and wherein the preferred embodiment of my invention is illustrated:

Figure 1 is a plan view of the surface of one of the concrete units.

Figure 2 is a transverse sectional view of the same.

Figure 3 is a view in perspective of a unit similar to that shown in Figure 1 with the addition of an integral spacing boss.

Figure 4 is an end elevation of the unit shown in Figure 3.

Figure 5 is a transverse sectional view of a slight modification of the unit shown in Figure 3 the surface of both sides being undercut or dovetailed.

Figure 6 is still another slight modification of the unit shown in Figure 1, one of the edges thereof being dovetailed.

tudinally from the mold.

' apertures 0 Referring in detail to the several figures the numeral 1 represents a block of molded concrete which may be of any suitable dimensions, but is here shown as having the dimensions of an ordinary weather-board. The length of the unit depends largely upon the weight and the facility with which it maybe handled. From three to four feet in lengthis a practical size for so heavy a material as concrete or cement. The upper face 2 of the block is provided with anumber of longitudinal dovetailed grooves 8 intermediate its sides aud with dovetailed half grooves i, at its side edges. lVhen adjacent units are fitted together at their sides, these half grooves become complete grooves so that the surface covered by the blocks is uniformly grooved throughout its extent. The dovetailed grooves and half grooves are made by withdrawing patterns having an appropriately shaped cross section, longi- The upper face 2 of the block or unit is provided also with rows of narrow recesses 4 which are here shown as inclined depressions, but which may be, in practice, of anyshape and placed according to any arrangement which may be found desirable. H

Adjacentits ends and also in its middle the unit 1 is provided with molded holes or whichserve for the entrance of nails when the unit is to be secured to wooden studding. A wire6 which is undulating in shape extends longitudinally through the block adjacent its sides and surrounds the nail apertures 5. The median portion of the block also'is provided with reinforcing wires which surround the nail apertures 5 and extend longitudinally, terminating a short distance from said apertures. At its sides the unit 1 is molded with a narrow rabbet 7 which when placed next to the corresponding rabbet of an adjacent unit forms a narrow groove which may be filled in with pitch or other substance for the purpose of water-proofing. In its preferred form the unit 1 may be provided on its lower or smooth face with a coating of asphalt 8 or other waterproofing material. The use of this is optional with the builder or the maker of the block and there are many situations in which the water-proof coating would not be required.

The unit thus described may be used in any capacity where wooden boards would ordinarily be applied and the particular use here contemplated is that of a weatherboard, molded direct to the studding and afterward coated with stucco, pebble dash or any other desired plastic finishing. A structure thus formed would be monolithic in character, light, warm, weather-proof and about as cheap to apply as ordinary clap-boards.

In FigureB is shown a slight modification of the unit shown in Figure 1 the distinction being in the addition of the boss 9, which is formed integral with the block in the molding process. Wherever it is desired to place two units side by side a uniform distance apart, the boss 9 will be found advantageous as a spacer as will presently appear in the description of a few of the built up members, which are fabricated from combinations of the single unit.

In Figures 5 and 6 are shown cross sec tional views of units in which both faces and a side have been grooved in order to adapt the units to particular uses. It is within the scope of my invention to provide the dovetailed or equivalent locking grooves to face or portion of the block which is to come into interlocking relation with another element of structure.

It is obvious that various changes may be made in the details of construction without departing from the invention and it is therefore to be understood that this invention is not to be limited to the specific construction shown and described.

Having described my invention what I claim as .new and desire to secure by Let ters Patent, is:

1. A concrete building unit comprising a fiat block having a face thereof provided with longitudinal dovetailed lock- .ing grooves extending below the level of the face of said block, and with looking recesses arranged angularlv of said grooves and a spacing boss projecting from the face of said block remote from the edges thereof.

2. A concrete building unit comprising a flat block having a face thereof provided in portions thickened by said ribs and surrounding said nail apertures.

l. A concrete building unit comprising a flat block, a face thereof being provided with longitudinally arranged locking grooves forming between them looking ribs, and with looking recesses extending below the face of said block and arranged along said ribs angularly of said locking grooves, said block being provided with apertures for nails running dept-hwise through said ribs and reinforcing wires running longitudinally through said block in portions thickened by said ribs.

5. A concrete building unit comprising a flat block having a face thereof provided with longitudinally arranged dovetailed locking grooves forming between them looking ribs and a spacing boss projecting from one of said ribs remote from the edges of said block.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

WILLIAM M. BASHLIN.

"Witnesses C. A. J. SPRINGTHORPE, LEILA CAMPBELL.

mg ribs apertures for nails running depth- 

